Physics 9702 · AS & A Level · Characteristics of alternating currents

Characteristics of alternating currents — practice question

Fig. 12.1 shows an incomplete simplified block diagram of the circuitry in a mobile-phone handset.

(a(i))[1]

State the name of the block marked X.

(a(ii))[1]

State the name of the block marked Y.

(b(i))[1]

Explain what the switch is for.

(b(ii))[2]

Explain what the parallel-to-serial converter is used for.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Modulator.” …